Nice work! Not much detail and the outlines on the Mechs don't make them stand out as if they are game characters too much, which is forgivable, but the black outline on the gunfire takes away from the asthetic. That could just be a style thing though and might just be my preference. The detail you did put in is very good! I could see the circular shadows being something in a game that could fit in any environment. I really like that and the detail on the cars as well. It would be awesome to see this animated, but I always love animation!

Overall I think you really are on to something with this concept! Great job... or maybe I should say, 'Crash and Burn'. 👍